Determining Concrete Composition on Recycled Aggregates

Koper, Artur; Koper, Marcin; Kubissa, Wojciech

doi:10.4028/www.scientific.net/kem.677.266

Cited by 8 publications

(9 citation statements)

References 4 publications

(11 reference statements)

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“…With reference to the results of ACV reported above, the heavy-weight aggregates had relatively low resistance to crushing. For example, ACV values of barite are higher than reported values of typical virgin rock aggregates and recycled aggregates (Koper et al 2015. This means the barite coarse aggregate had lower crushing resistance than typical virgin rock and recycled aggregates.…”

Section: Discussionmentioning

confidence: 74%

Utilisation of Copper Slag Waste and Heavy-weight Aggregates for Production of Pre-cast shielding Concrete Elements

Kubissa

Jaskulski²,

Ng³

et al. 2018

Journal of Sustainable Architecture and Civil Engineering

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Concrete as a versatile building material can provide physical and biological shielding against ionizing radiation. In addition to nuclear reactor covers, facilities requiring radiation protection are radiological and X-ray laboratories in hospitals or health centres. The function of radiation protection can be met by heavyweight concrete, whose shielding properties are largely derived from the high-density aggregates. One of the possible construction methods of shielding walls in healthcare buildings is the use of precast concrete blocks. For this purpose, research on a concrete having a density in the air-dry state of higher than 3200 kg/m 3 using barite, magnetite and basalt as coarse aggregate and copper slag waste (from by-product of the process of copper extraction by smelting) as fine aggregate has been performed. The copper slag waste has been used, among others, as an abradant in the surface sandblasting process but after such usage it is considered to be a waste and as indicated by pilot research, it can be a good substitute for sand in concrete. Mechanical properties, water absorption and sorptivity of heavyweight concrete so produced were compared with reference concrete prepared with crushed amphibolite as coarse aggregate and quartz sand as fine aggregate. The suitability of copper slag waste for making small precast shielding concrete elements is confirmed. The compressive strength of heavyweight concrete mixtures with copper slag waste was sufficient for the intended applications. The copper slag concrete had lower water absorption and sorptivity than concrete prepared with sand. An economic analysis of the costs of producing concrete with a density higher than 3200 kg/m 3 with or without copper slag waste showed that the copper slag concrete, regardless of the type of heavyweight aggregate used, is clearly more economical than the concrete of the compositions reported in the literature containing similar coarse aggregates and sand as the fine aggregate.

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Section: Discussionmentioning

confidence: 74%

Utilisation of Copper Slag Waste and Heavy-weight Aggregates for Production of Pre-cast shielding Concrete Elements

Kubissa

Jaskulski²,

Ng³

et al. 2018

Journal of Sustainable Architecture and Civil Engineering

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“…The rational concrete compositions must also provide a set of standardized properties, taking into account the manufacturing technology of structures and their operation features. Moreover, concrete composition design should also consider the possibility of using technogenic waste and its effect on the concrete properties [ 7 , 8 , 9 , 10 , 11 ]. The main material resource, the rational use of which characterizes, to a large extent, the concrete composition’s effectiveness, is cement [ 12 , 13 , 14 , 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Slag-Containing Steamed Concrete’s Composition Efficiency

Dvorkin,

Zhitkovsky,

Makarenko

et al. 2024

Materials

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Thermal power plant slag is a waste that is presently obtained from many power stations all over the world. A possible method for its utilization is using it to produce concrete. This paper analyses the effect of thermal power plant slag on the technological properties of concrete mixtures and the mechanical properties of concrete subjected to heat–moisture processing. Quantitative estimates of the investigated factors’ influence on the concrete mixture’s water demand and the strength of steamed concrete were obtained. The influences of TPP slag content and its water demand on concrete composition features as well as concrete strength are shown. The novelty of the work lies in the use of an experimental–statistical model to optimize the composition of steamed concrete using slag from the viewpoint of maximum strength per kilogram of cement. It has been demonstrated that the optimal part of slag in aggregate, which provides maximum strength at 4 h and 28 days after steaming, is 0.5–0.55 and 0.45–0.55, respectively. A method for the design of concrete composition using slag from thermal power plants is proposed.

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“…On the other hand, the quality of the aggregate depends primarily on the origin and quality of the concrete from which it was obtained. Numerous researches preceding the introduction of RCA for concrete production have allowed to classify it in terms of quality and to formulate the requirements for their properties to ensure the quality of good concrete [3,4,5,6]. The formulation of qualitative requirements for aggregates is to ensure that the RCA used to produce the concrete will not significantly reduce its parameters.…”

Section: Introductionmentioning

confidence: 99%

“…Some of the methods are based on the aggregate properties determined by the Aggregate Crushing Value (ACV) [4] or the toughness of the aggregate determined in the Los Angeles abrasion test. Also used in such methods is the aggregate resistance to abrasion, denoted as Micro-Deval [8].…”

Section: Introductionmentioning

confidence: 99%

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Predicting of the compressive strength of RCA concrete

et al. 2017

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Abstract. The paper presents the results of predicting the strength of 61 concretes made with the use of recycled concrete aggregate (RCA). Five models in the form of first-order polynomials containing two to six variables characterizing the composition of the mixture were formulated for this purpose. Factors for unknowns were selected using linear regression in two variants: with and without additional coefficient. For each model, the average absolute error of the concrete strength estimation was determined. Because of the various consequences of underestimation and overestimation of the results, the analysis of models quality was carried out with the distinction of the two cases. The results indicate that the key to improving the quality of models is to take into account the quality of the aggregate expressed by the ACV parameter. Better match results were also obtained for models with more variables and the additional coefficient.

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Determining Concrete Composition on Recycled Aggregates

Cited by 8 publications

References 4 publications

Utilisation of Copper Slag Waste and Heavy-weight Aggregates for Production of Pre-cast shielding Concrete Elements

Utilisation of Copper Slag Waste and Heavy-weight Aggregates for Production of Pre-cast shielding Concrete Elements

Analysis of Slag-Containing Steamed Concrete’s Composition Efficiency

Predicting of the compressive strength of RCA concrete

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